Tailoring the mechanical properties of bulk metallic glasses via cooling from the supercooled liquid region  

作　　者：ZHANG LangTing DUAN YaJuan WANG YunJiang YANG Yong QIAO JiChao 

机构地区：[1]School of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University,Xi'an 710072,China [2]Department of Physics,Barcelona Research Center in Multiscale Science and Technology,Institute of Energy Technologies,Universitat PolitecnicadeCatalunya,Barcelona08019,Spain [3]State Key Laboratory of Nonlinear Mechanics,Institute of Mechanics,Chinese Academy of Sciences,Beijing 100190,China [4]School of Engineering Science,University of Chinese Academy of Sciences,Beijing 100049,China [5]Department of Mechanical Engineering,College of Engineering,City University of Hong Kong,Hong Kong 999077,China [6]Department of Materials Science and Engineering,College of Engineering,City University of Hong Kong,Hong Kong 99077,China [7]Innovation Center,NPU-Chongqing,Chongqing 401135,China

出　　处：《Science China(Technological Sciences)》2023年第1期173-180,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 51971178 and 52271153);financially supported by National Natural Science Foundation of China (Grant No. 12072344);the Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province(Grant No. 2021JC-12);the Natural Science Foundation of Chongqing(Grant No. cstc2020jcyj-jq X0001);sponsored by the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (Grant No. CX2021015);the Youth Innovation Promotion Association of the Chinese Academy of Sciences;financial support from Research Grant Council (RGC) and the Hong Kong government through the General Research Fund (GRF)(Grant Nos.U11200719 and U11213118)。

摘　　要：Structural rejuvenation is vital and attractive for modulating the energetic state and structural heterogeneity of bulk metallic glasses(BMGs). In this paper, we show that cooling a BMG from a supercooled liquid region at laboratory rates can reverse the relaxation enthalpy lost during the preceding structural relaxation. Increasing the cooling rate is beneficial for enhancing atomic mobility and dynamic mechanical relaxation intensity. Therefore, this rejuvenation methodology promotes tailoring the mechanical properties of BMGs and provides a comprehensive understanding of the rejuvenation mechanism.

关 键 词：bulk metallic glass thermal rejuvenation supercooled liquid region mechanical relaxation structural heterogeneity 

分 类 号：TB383[一般工业技术—材料科学与工程]